Odor suppression in ammonia-containing cosmetic products

ABSTRACT

A method and composition are disclosed with which it becomes possible to reduce the perception of ammonia odor in ammonia-containing compositions such as hair bleaches and colorants. A perfume composition containing at least one perfume material which is olfactively stable in the ammonia base and satisfies one of the following criteria is added to the ammonia-containing composition: 
     (1) contains a phenyl ring moiety and has an air diffusion coefficient of &gt;5.7, 
     (2) contains a C-5 ring moiety, which also contains at least 1 carbon which is sp2 hybridized, and has an air diffusion coefficient of &gt;4.4.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention concerns reduction of the perception of ammoniaodor in ammonia containing compositions such as hair bleaches andcolorants.

2. Discussion of the Related Art

Many hair treatment compositions contain ammonia and are characterizedby an offensive odor.

For example, hair-bleaching agents based on a peroxide oxidation agent,such as hydrogen peroxide, urea peroxide, melamine perhydrate, etc. aregenerally used for the bleaching of human hair. The action of aqueoushydrogen peroxide solution per se, even under alkaline conditions, istoo slow, so that hair damage may occur. Aqueous ammonia is an effectiveactivator for the hair bleaching action of aqueous peroxide solutions,accelerating the oxidative destruction of the particles of the hairpigment (melanosomes), speeding up the rate at which the hair pigmentsare oxidized. It has therefore been customary to use ammonia inbleaching compositions for this purpose.

In addition, the pH of the aqueous hydrogen peroxide solutions must beadjusted to the alkaline side if they are to serve as effectivebleaching agents for hair. Although the pH effect is different from theactivator effect of ammonia (since the pH effect can be accomplishedwith alkaline materials other than ammonia), it has been common practiceto use ammonia both for its activator effect and for its pH adjustingeffect on the composition. As a consequence, with a few exceptions,essentially all the commercial hair bleaching compositions containsubstantial quantities of ammonia.

Further, in hair dyes, the color vehicle for the dye intermediates isemployed at a pH usually between about 9 and 11. Adjustment of pH to thedesired level of alkalinity can be accomplished with ammonium hydroxide.The ammonium hydroxide base is preferred since ammonia assists inswelling the hair fiber and is easily removed.

Unfortunately, the presence or evolution of ammonia results in aparticularly disagreeable strong ammonia odor. It is generally acceptedthat the unpleasant odor of ammonia cannot be masked even by perfuming.

Accordingly, efforts have been made in the prior art to provideammonia-free hair bleaching compositions. One such attempt is describedin U.S. Pat. No. 2,283,350. This patent describes the use of aliphaticamines or alkanolamines in place of ammonia or ammonium hydroxide toavoid the unpleasant ammonia odor. However, in this case, the resultingbleach mixture is more damaging (for the same degree of lightening) tothe keratin hair fibers.

Another attempt at providing an ammonia-free hair bleach composition canbe found in the U.S. Pat. No. 3,816,615 to Zeffern et al. In this case,activation of the peroxide oxidizing agent is accomplished by means ofcertain dicarbonyl compounds. In place of ammonium hydroxide, thepatentees employ certain guanidine salts. This approach has not receivedany wide acceptance in the industry, which is probably due to the factthat the hair damage encountered in the use of the amines noted above isalso encountered with the guanidine compounds.

Another approach to the odor problem has been to replace ammonia byodorless alkalinization agents such as alkali metal hydroxides,magnesium oxide or by alkanolamines, and to further accelerate thebleaching process in order to avoid the disadvantages of ammonia on theone hand and, on the other hand, to minimize the oxidative damage to thehair. U.S. Pat. No. 4,226,852 (Tesmann, et al.) teaches a two-componentcomposition for bleaching hair comprising a peroxide oxidation agent, anammonia-free alkalinization agent, and a guanidine derivative asbleaching accelerator. Unfortunately, guanidine derivatives areassociated with hair damage.

A water insoluble gel is generally used to keep the bleach mixture onthe hair fibers and prevent it from running or creeping away from thehair shaft and to run down off the head. The use of water-insolublesurfactants (see U.S. Pat. No. 2,283,350 for the use of high molecularweight alcohols for this purpose), however, greatly affects thelightening ability of the bleach mixture. To overcome reduced bleachingactivity, high levels of ammonia are required. In conventional gels, theammonia contained in the hair dye compositions is quickly given off fromthe gels to the environment, causing an odor problem. A loss of ammoniain the hair dye composition also lessens the covering power of the dyes,especially on gray hair. The same is essentially true of compositionsthat employ water-insoluble thickening agents. These also requirerelatively high levels of ammonia to raise the activity of the bleachcomposition to a suitable level.

U.S. Pat. No. 4,507,278 (DeMarco, et al.) teaches that, by utilizingwater-soluble surfactant thickening agents, it is possible to dispensewith the need for using ammonia as an activator. In this case, anon-ammonia alkalizing agent, and preferably one which does not have thepotentiality for hair damage, can be employed to give the compositionits appropriate pH. However, when only water-soluble surfactantthickening agents are employed, the viscosity of the product when it isapplied to the head is too low for satisfactory application of thebleach. On the other hand, when an effort was made to increase theviscosity by the addition of water-insoluble surfactant thickeningagents, it was found that the effectiveness of the bleachingcomposition, i.e., the rate at which the bleaching action occurred, wasreduced to an unacceptable level. It was discovered that if a smallquantity of ammonia is present in the composition (no greater than 0.55%by weight based on the total weight of the composition measured asammonium ion concentration) and the ratio of water-soluble towater-insoluble surfactant thickener was maintained in the range of from1.8 to 7.0, a highly effective product is obtained having the requisitelevel of bleaching activity, a suitable viscosity in use for applicationof the bleach, and substantially no ammonia odor.

Nevertheless, most hair coloring products in general use continue to becomprised of aqueous solutions with up to about 8% ammonia. Ammoniaodors emanating from the coloring composition are difficult to mask andcan be offensive to the hair color user.

There is thus a need for a method for the suppression of the ammoniaodor in an ammonia-containing hair colorant.

SUMMARY OF THE INVENTION

The general understanding in the art is that ammonia odors are toointense to be masked by a perfume composition.

The present invention began by undertaking an investigation which rancontrary to this conventional wisdom. After extensive testing, it wassurprisingly found that the perception of reduced ammonia odor does notdepend on the maskant material's odor detection threshold or on theperceived inherent intensity of the maskant material. Rather, it wasfound that the perception of the ammonia odor can be lessened by use ofmaskant materials with a high air diffusion coefficient.

Perfumes containing at least 25% of materials satisfying the criteria ofthe invention can be expected to cover the perception of ammonia betterthan those which do not.

The foregoing has outlined rather broadly the features and technicaladvantages of the present invention in order that the detaileddescription of the invention that follows may be better understood.Additional features and advantages of the invention will be describedhereinafter which form the subject of the claims of the invention.

DETAILED DESCRIPTION OF THE INVENTION

Typically, perfumes are created for hair colors or bleachingcompositions by selecting materials known to be stable in the systems.The present inventor amassed a large collection of such perfumes.

Materials listed in Table 1 were tested for stability in an 8% ammoniasystem. Materials were dosed at 1% into the ammonia base. Solids weremade into a 10% dilution and dosed at 1%. The materials were evaluatedfor ammonia coverage, olfactive odor stability, and visual physicalappearance (color, cloudiness) at 1, 2, and 3 weeks, and at 5° C., 25°C., and 38° C. The materials were not solubilized for the raw materialstudy. Full results were tabulated and are presented in Table 2.

A list of the air diffusion coefficients for the materials studied isset forth in Table 3.

After subjecting the materials to a variety of tests and recording theresults on a table for comparative analysis, it was discovered that theability of a material to mask the perception of ammonia from an aqueousmedia can be predicted using the following criteria, wherein suitablematerials fall into two groups:

Group 1: Materials falling into this category are expected to mask theperception of ammonia if they:

1. Are olfactively stable in the ammonia base—i.e., these materials maychange but do not degrade to a sharp, green aldehydic character.

2. Contain a phenyl ring moiety.

3. Have an air diffusion coefficient of >5.7.

Group 2: Materials falling into this category are expected to mask theperception of ammonia if they:

1. Are olfactively stable in the ammonia base—i.e., these materials maychange but do not degrade to a sharp, green aldehydic character.

2. Contain a C-5 ring moiety, which also contains at least 1 carbonwhich is sp2 hybridized.

3. Have an air diffusion coefficient of >4.4.

Perfumes containing at least 25W of materials of Group I and/or Group IIcan be expected to cover the perception of ammonia better than thosewhich do not.

TABLE I Dragoco Material Number Test Group ETHYL ACETOACETATE 4/910050 1HEXYL CINNAMIC ALDEHYDE 3/011371 1 LILIAL 4/929325 1 ORANGE OIL FLORIDA4/777160 1 DIOLA 3/926899 1 PHENYL ETHYL ALCOHOL 3/964540 2 ISO BORNYLACETATE 3/943760 2 ISO E SUPER 0/115115 2 TETRAHYDRO LINALOOL 4/901360 2FLORAZONE 3/034395 2 DIHYDRO TERPINEOL 4/016236 3 METHYL IONONE GAMMA4/931205 3 YLANAT 3/084021 3 YLANAT ORTHO 3/084027 3 MELONAL 3/054211 3ALLYL CYCLOHEXYL PROPIONATE 3/011241 4 CYCLOHEXYL ETHANOL 3/924060 4FLOROL 3/934060 4 GERANYL ACETATE 3/039991 4 PRENYL ACETATE 3/026832 4ROSEMARY OIL TUNISIA 1/510706 5 CRESSANTHER 3/045062 5 PETIOLE 4/7801625 YSAMBER K 3/055120 5 ALLYL HEPTOATE (C-7) 4/010500 5 ANTHER 3/912100 6EUCALYPTUS GLOBULUS 1/913422 6 MAYOL 3/954401 6 CEDRAMBER 3/018911 6CEDROL LIQUID 3/019281 6 TONALID 3/976500 7 GALAXOLIDE 50 DEP 4/900551 7PHENAFLEUR 3/964150 7 TRIDECENE-2-NITRILE 3/076791 7 CLONAL 3/923790 7VELOUTONE 4/949088 8 METHYL NAPTHYL KETONE 4/933020 8 NEROLIN YARA YARA3/959050 8 SANDRANOL 3/070540 8 CISTULATE 09126 3/920335 8 PADMA3/064461 9 METHYL CHAVICOL 4/131155 9 RHUBAFURAN 4/941135 9 RHUBOFIX3/971450 9 DELPHONE, FIRMENICH 4/916128 9 GRAPEFRUIT BASE 15.794 B0/115317 10  ORANGE JUICE CARBONYLS 4/777119 10  CAMPHENE 4/726750 10 BENZALDEHYDE 3/914590 10 

1 Week, 5 C 2 Week, 5 C 3 Week, 5 C NH3 NH3 NH3 Color/ RM Cover- Color/RM Cover- Color/ RM Cover- Material Number % Physical Odor age PhysicalOdor age Physical Odor age Orange 4/777160 1.0% As OK 2 OK, flat 3 OK,aldehydic, 2 Oil Florida RM, 8 mm citrus hazy orange, 8 mm Cloudycaraway Cloudy Top Top Diola 3/926899 1.0% OK, OK 5 Ok, banana, 4 OK,green, 4 sl. Clear green Clear banana, Swirly fruity cloudiness Ethyl4/910050 1.0% OK, OK 3 OK, sour, 2 OK, pungent, 1 Acetoacetate ClearClear weak Clear rancid Lilial 4/929325 1.0% OK, Oxidized 2 OK, Flora, 3OK, sour, 2 Clear Clear oxidized Clear oxidized Hexyl 3/011731 1.0% OK,Changed 2 OK, floral, 3 OK, low 2 cinnamic 3 mm Hazy jasmin hazyAldehyde cloudy throughout top Tetrahydro- 4/901360 1.0% OK, OK 2 OK,floral, 3 OK, floral 3 linalool 5 mm 3 mm green cloudy Cloudy cloudy Toptop Florazone 3/034395 1.0% OK, OK 5 OK, green, 4 OK, floral 3 ClearClear sl. Clear ozone, Sour green plastic Iso E 0/115115 1.0% OK, OK 2OK, woody, 4 OK, sl. 2 Super Clear 3 mm floral cloudy Sour, cloudy woodytop Iso Bornyl 3/943760 1.0% OK, OK 3 OK, woody, 4 OK, borneol, 3Acetate 8 mm 5 mm borneol 10 mm isobornyl Cloudy Cloudy cloudy ace Toptop Phenyl 3/964540 1.0% OK, OK 4 OK, rose, 5 OK, rosy 4 Ethyl ClearClear floral Clear Alcohol Dihydro 4/016236 1.0% OK, OK 3 OK, sour, 2OK, floral, 3 Terpineol 5 mm 2 mm terpineol 2 mm green, Cloudy cloudycloudy sour Top Ylanat 3/084027 1.0% OK, Woody/ 3 OK, sour, 2 OK, woody,3 Ortho 5 mm Green 5 mm sharp, 5 mm sharp Cloudy Cloudy green cloudygreen Top top Ylanat 3/084021 1.0% OK, OK 3 OK, sour, 2 OK, woody, 3 5mm 8 mm sharp 5 mm sharp Cloudy Cloudy cloudy green Top top Melonal3/054211 1.0% OK, Sour, 2 OK, plasticky, 1 OK, plastic, 2 Clear AcidicClear melon Clear sour Methyl 4/931205 1.0% OK, OK 4 OK, woody 3 oK,ionone 3 Ionone 5 mm 3 mm 3 mm Gamma Cloudy cloudy cloudy Top top ALLYL3/011241 1.0% OK, OK 2 OK, pineapple 3 OK, pineapple, 2 CYCLOHEXYL 8 mmClear 1 mm fruity PROPIONATE Cloudy cloudy Top CYCLOHEXYL 3/924060 1.0%OK, OK 1 OK, floral, 3 OK, green, 2 ETHANOL 5 mm Clear green, 4 mm waxyCloudy plastic cloudy floral Top FLOROL 3/934060 1.0% OK, OK 3 OK,floral, 4 OK, jasmine, 2 Clear Clear muguet Clear floral GERANYL3/039991 1.0% OK, OK 3 OK, weak 1 ACETATE 5 mm Clear geraniol Cloudy TopPRENYL 3/026832 1.0% OK, Prenol? 3 OK, sour 1 ACETATE Clear Solvent/Clear solvent Fruity ROSEMARY 1/510706 1.0% OK, OK 3 OK, camphor, 3 OK,eucaly 4 OIL Clear Clear herbal Clear ptus-like TUNISIA CRESSANTHER3/045062 1.0% OK, OK 4 OK, green, 3 oK, green, 1 5 mm 10 mm floral 3 mmaldehydic Cloudy cloudy cloudy Top PETIOLE 4/780162 1.0% OK, sharp 2 OK,plastic, 2 OK, green, 3 Clear green Clear floral, Clear floral hyacinthYSAMBER K 3/055120 1.0% OK, sharp 1 OK, woody, 2 oK, woody 2 5 mm woody20 mm amber 3 mm Cloudy green cloudy cloudy Top ALLYL 4/010500 1.0% OK,pineapple, 2 OK, fruity, 3 OK, pineapple, 1 HEPTOATE sl. fruity Hazypineapple Clear (C-7) Swirly throughout cloudiness ANTHER 3/912100 1.0%OK, Green, 2 OK, green 3 oK, green, 3 3 mm harsh 10 mm fruity 3 mmfloral cloudy cloudy cloudy top EUCALYPTUS 1/913422 1.0% OK, Eucal- 3OK, camp 3 OK, camp 1 GLOBULUS Clear yptus, Clear horic, Clear hor, campmedicinal eucal hor yptus MAYOL 3/954401 1.0% OK, Floral, 2 ok, sharp 2OK, green, 2 20 mm green, 30 mm green 10 mm floral cloudy weak cloudyfloral cloudy woody CEDRAMBER 3/018911 1.0% OK, harsh 2 OK, sharp 2 OK,woody, 3 15 mm woody 20 mm woody 5 mm amber Cloudy cloudy cedar cloudyCEDROL 3/019281 1.0% OK, woody, 2 OK, sl. 3 OK, woody 4 LIQUID Clearcedar Clear Woody Clear 10% in DPG TONALID, 3/976500 1.0% OK, musk 2 OK,musk 1 OK, musk, 3 10% in Clear Clear Clear tonalid DPG GALAXOLIDE4/900551 1.0% OK, musk 3 OK, musk 2 OK, musk, 3 50 Clear Clear Clearsweet DEP PHENAFLEUR 3/964150 1.0% OK, rose, 3 OK, sharp 2 OK, rose, 310 mm green Cloudy green 2 mm green Cloudy cloudy top TRIDECENE-2-3/076791 1.0% OK, citrus, 2 OK, sharp, 3 OK, citrus, 2 NITRILE 10 mmnitrile 10 mm nitrile 5 mm nitrile Cloudy cloudy cloudy top CLONAL3/923790 1.0% OK, citrus, 4 OK, sharp 1 OK, citrus 3 10 mm nitrile 10 mmnitrile 5 mm nitrile, Cloudy cloudy cloudy green top VELOUTONE 4/9490881.0% OK, celery, 4 OK, jasmin 2 OK, jasmine, 3 sl. jasmin 3 mm swirlyfloral Haze cloudy cloudy top METHYL 4/933020 1.0% OK, orange 2 OK,orange 2 OK, orange 1 NAPHTHYL Clear flower Clear flower Clear flowerKETONE 10% dpg NEROLIN 3/959050 1.0% OK, orange 3 OK, Nerolin 3 OK,orange 1 YARA Clear flower Clear Clear flower YARA 10% dpg SANDRANOL3/070540 1.0% OK, sandal 4 OK, sandal 3 OK, sandal 4 10 mm wood 10 mm 15mm wood Cloudy cloudy cloudy top CISTULATE 3/920335 1.0% OK, piney, 3OK, woody 2 OK, sour, 2 09126 3 mm green 1 mm 1 mm citrus, cloudy cloudcloudy woody top PADMA 3/064461 1.0% OK, green, 3 OK, hyacinth 4 OK,green 3 Clear hyacinth Clear Clear sharp METHYL 4/131155 1.0% OK, anise4 OK, licorice, 2 OK, licorice, 2 CHAVICOL 3 mm 5 mm basil cloudy herbalcloudy Cloudy top top RHUBAFURAN 4/941135 1.0% OK, aldehydic, 2 OK,green, 4 OK, green, 2 Clear woody Clear woody, clear plastic aldehydicRHUBOFIX 3/971450 1.0% OK, aldehydic, 3 OK, green, 2 OK, green, 4 3 mmgreen 1 mm woody, cloudy sharp cloudy woody, cloud lactonic top floralDELPHONE, 4/916128 1.0% OK, jasmone 4 OK, jasmine, 4 OK, celery 4FIRMENICH hazy 1 mm fruity cloudy cloud GRAPEFRUIT 0/115317 1.0% OK,woody, 1 OK, sl 1 OK, grapefruit 2 BASE Clear grapefruit Cleargrapefruit Clear 15.794 B ORANGE 4/777119 1.0% OK, OK, 3 ok. sl orange,3 OK, fruity, 2 JUICE Clear orange, milky v sl Clear orange CARBONYLSsweet sour aldehydic CAMPHENE 4/726750 1.0% OK, pine, 2 OK, camphene, 3OK, aromatic, 4 Clear diffusive Clear pine Clear pine BENZALDEHYE3/914590 1.0% OK, flat, 3 OK, changed, 4 OK, sl. 4 Clear not clear notClear Fruity? typical unpleasant 1 Week, 25 C 2 Week, 25 C 3 Week, 25 CNH3 NH3 NH3 Color/ RM Cover- Color/ RM Cover- Color/ RM Cover- MaterialNumber % Physical Odor age Physical Odor age Physical Odor age Orange4/777160 1.0% As OK 1 OK, lemon, 2 OK, aldehydic, 3 Oil Florida RM,Clear citrus, Clear fruity Clear changed, lower impact Diola 3/9268991.0% OK, OK 5 OK, banana, 4 OK, green, 3 Clear Clear green Clear bananaEthyl 4/910050 1.0% OK, OK, 2 OK, sour, 2 OK, sour 1 Acetoacetate Clearlow Clear fruity clear solventy Lilial 4/929325 1.0% OK, Oxidized 3 OK,faint 3 OK, sour, 2 Clear Clear floral Clear oxidized Hexyl 3/0113711.0% OK, Changed, 3 OK, floral 3 OK, low 2 cinnamic Clear sour ClearClear Aldehyde Acidic Tetrahydro- 3/034395 1.0% OK, OK 2 OK, green 3 OK,floral 2 linalool Clear v. sl floral Clear hazy Florazone 3/034395 1.0%OK, OK 4 OK, green, 3 OK, floral, 3 Clear Clear floral, Clear v slplastic sour plastic Iso E 0/115115 1.0% OK, OK 3 OK, woody 4 Dark,woody 3 Super Clear clear Clear Iso Bornyl 3/943760 1.0% OK, OK/ 4 OK,borneol- 2 OK, borneol 1 Acetate Clear Sl clear ish Clear Borneol- likePhenyl 3/964540 1.0% OK, OK 5 OK, rose, 4 OK, green, 4 Ethyl Clear Cleargreen Clear rose, Alcohol floral Dihydro 4/016236 1.0% OK, OK 1 sl.sour, 1 OK, floral, 1 Terpineol Clear Darker, burning Clear plastic,Clear sour Ylanat 3/084027 1.0% OK, Woody/ 2 OK, sour, 2 OK, woody, 2Ortho Clear Green Clear sharp Clear green, sharp Ylanat 3/084021 1.0%OK, Woody/ 2 OK, sour 1 OK, woody, 2 Clear Green Clear Clear green,sharp Melonal 3/054211 1.0% OK, Sour, 3 OK, plasticky 1 OK, plastic, 1Clear Fruity Clear Clear sour, sharp Methyl 4/931205 1.0% OK, OK 4Darker, woody 2 Dar, Ionone, 2 Ionone Clear Clear Clear weak Gamma ALLYL3/011241 1.0% OK, OK 3 OK, fruity, 2 OK, pineapple, 3 CYCLOHEXYL ClearClear pineapple clear fruity PROPIONATE sharp CYCLOHEXYL 3/934060 1.0%OK, OK 2 OK, floral, 3 OK, green, 1 ETHANOL Clear Clear green, Clearfloral, plastic fruity FLOROL 3/934060 1.0% OK, OK 3 OK, floral, 4 OK,jasmine, 2 Clear Clear muguet Clear floral GERANYL 3/039991 1.0% OK,Geraniol 2 OK, weak 1 ACETATE Clear Clear geraniol PRENYL 3/026832 OK,Solvent, 1 OK, sour 1 ACETATE Clear Sour, Clear solvent Fruity ROSEMARY1/510706 1.0% OK, OK, 3 OK, camphoric 2 OK, camphor, 2 OIL Clearcamphor/ Clear Clear eucal TUNISIA eucal lptus yptus CRESSANTHER3/045062 1.0% OK, OK, 4 OK, green, 3 OK, green 1 Clear sweet, Clearfloral Clear aldehydic green, floral PETIOLE 4/780162 1.0% OK, sharp 3OK, green, 3 OK, green, 3 Clear green Clear floral Clear floral YSAMBERK 3/055120 1.0% OK, green 3 OK, woody, 2 OK, woody, 1 Clear woody Clearsour Clear timberol- like ALLYL 4/010500 1.0% OK, fruity 4 OK, fruity, 2OK, fruity, 2 HEPTOATE Clear pineapple Clear pineapple Clear pineapple(C-7) ANTHER 3/912100 1.0% OK, green 2 OK, green, 2 OK, green, 2 Clearfloral Clear fruity, Clear floral harsh woody EUCALYPTUS 1/913422 1.0%OK, eucal 1 OK, camp 3 OK, eucal 1 GLOBULUS Clear yptus, Clear horic,Clear yptus camphoric medicinal MAYOL 3/954401 1.0% OK, green 3 OK,sharp 2 OK, green, 1 10 mm floral, 25 mm green 10 mm floral Cloudy weakCloudy plastic cloudy CEDRAMBER 3/018911 1.0% OK, woody, 3 OK, woody, 2OK, woody, 2 Clear cedar Clear sharp Clear amber CEDROL 3/019281 1.0%OK, woody, 4 OK, woody 3 OK, woody, 3 LIQUID Clear cedar Clear Clearflat 10% in DPG TONALID, 3/976500 1.0% OK, musk 1 OK, tonalid 2 OK,musk, 2 10% in Clear Clear Clear tonalid DPG GALAXOLIDE 4/900551 1.0%OK, musk 3 OK, galax 3 OK, musk, 3 50 Clear Clear olide Clear galax DEPolide PHENAFLEUR 3/964150 1.0% OK, rose, 2 OK, sharp 2 OK, rose, 3 Cleargreen Clear green Clear green TRIDECENE-2- 3/076791 1.0% OK, citrus, 3OK, nitrile, 3 OK, citrus, 3 NITRILE 3 mm nitrile cloudy sl. sl nitrileCloudy top Sour swirly top cloudy CLONAL 3/923790 1.0% OK, citrus, 4 OK,nitrile 2 OK, citrus, 3 8 mm nitrile 10 mm 5 mm nitrile, Cloudy cloudycloudy green top top VELOUTONE 4/949088 1.0% OK, fruity, 2 OK, jasmine 3OK, jasmine, 2 Clear jasmine, Clear Clear green celery METHYL 4/9330201.0% OK, orange 3 OK, low 2 OK, orange 2 NAPHTHYL Clear flower ClearClear flower, KETONE sweet 10% dpg NEROLIN 3/959050 1.0% OK, orange 3OK, nerolin 3 OK, orange 3 YARA Clear flower Clear Clear flower, YARAsweet 10% dpg SANDRANOL 3/070540 1.0% OK, very 2 OK, sandal 3 OK, sandal3 10 mm strong 10 mm wood 20 mm wood Cloudy sandal cloudy cloudy topCISTULATE 3/920335 1.0% OK, sweet, 3 OK, woody, 3 OK, woody, 2 09126Clear woody Clear naphthyl Clear sour PADMA 3/064461 1.0% OK, green, 3OK, hyacinth 4 OK, green 3 Clear hyacinth Clear Clear sharp METHYL4/131155 1.0% OK, anise 2 OK, licorice, 2 OK, licorice, 2 CHAVICOL ClearClear herbal Clear herbal RHUBAFURAN 4/941135 1.0% OK, aldehydic, 2 OK,green, 3 OK, green, 2 Clear green, Clear woody, Clear plastic sharpaldehydic RHUBOFIX 3/971450 1.0% OK, green, 2 OK, sharp 3 OK, green, 4Clear floral Clear green Clear sharp, aldehydic DELPHONE 4/916128 1.0%OK, jasmone 4 OK, fruity, 3 OK, jasmine 4 FIRMENICH Clear Clear jasmineClear GRAPEFRUIT BASE 15.794 B ORANGE JUICE CARBONYLS CAMPHENEBENZALDEHYE 1 2 3 1 Week, 38 C Week week week NH3 Avg Avg Avg Color/ RMCover- NH3 NH3 NH3 Material Number % Physical Odor age Cover Cover CoverOrange 4/777160 1.0% As Flat 1 1 3 3 Oil Florida RM, Aldehydic sl.Cloudi- ness Diola 3/926899 1.0% OK, OK 5 5 4 4 Clear Ethyl 4/9100501.0% OK, Sour, 1 2 2 1 Acetoacetate Clear Acidic Lilial 4/929325 1.0%OK, Oxidized 4 3 3 2 Clear Hexyl 3/011371 1.0% OK, Sl 2 2 3 2 cinnamicClear changed Aldehyde Tetrahydro- 4/901360 1.0% OK, OK 2 2 3 3 linaloolClear Florazone 3/034395 1.0% OK, OK 4 4 4 3 Clear Iso E 0/115115 1.0%Yellower, OK 3 3 4 3 Super Clear Iso Bornyl 3/943760 1.0% OK, OK to 3 33 2 Acetate Clear Borneol Phenyl 3/964540 1.0% OK, OK 4 4 5 4 EthylClear Alcohol Dihydro 4/016236 1.0% OK, OK? 1 2 2 2 Terpineol ClearYlanat 3/084027 1.0% Yellower, Woody/ 3 3 2 3 Ortho Clear Green Ylanat3/084021 1.0% Yellower, Woody/ 2 2 2 3 Clear Green Melonal 3/054211 1.0%OK, Sour, 3 3 1 2 Clear acidic, plastic Methyl 4/931205 1.0% Yellower,OK 4 4 3 3 Ionone Clear Gamma ALLYL 3/011241 1.0% OK, sl. 2 2 3 3CYCLOHEXYL Clear Sour, PROPIONATE mostly OK CYCLOHEXYL 3/924060 1.0% OK,Sour 1 1 3 2 ETHANOL Clear FLOROL 3/934060 1.0% OK, OK 3 3 4 2 ClearGERANYL 3/039991 1.0% OK, Geraniol/ 2 2 1 0 ACETATE Clear Nerol PRENYL3/026832 1.0% OK, Plastic/ 1 2 1 0 ACETATE Clea Solvent ROSEMARY1/510706 1.0% OK, camphor/ 1 2 3 3 OIL Clear eucal TUNISIA ytusCRESSANTHER 3/045062 1.0% OK, green, 2 3 3 1 Clear floral PETIOLE4/780162 1.0% OK, green, 2 2 3 3 Clear aldehydic YSAMBER K 3/055120 1.0%OK, sl. 1 2 2 2 Clear Woody, not stable ALLYL 4/010500 1.0% OK, fruity,2 3 3 2 HEPTOATE Clear pineapple (C-7) ANTHER 3/912100 1.0% OK, green 12 3 3 Clear floral EUCALYPTUS 1/913422 1.0% OK, very 1 2 3 1 GLOBULUSClear camp horac eous MAYOL 3/954401 1.0% OK, green 3 3 2 2 hazy floralweak CEDRAMBER 3/018911 1.0% OK, woody, 1 2 2 3 Clear cedar CEDROL3/019281 1.0% OK, woody, 4 3 3 4 LIQUID Clear cedar 10% in DPG TONALID,3/976500 1.0% OK, musk 1 1 2 3 10% in Clear DPG GALAXOLIDE 4/900551 1.0%OK, musk 2 3 3 3 50 Clear DEP PHENAFLEUR 3/964150 1.0% OK, green 2 2 2 3Clear rose TRIDECENE-2- 3/076791 1.0% OK, citrus, 3 3 3 3 NITRILE Clearnitrile, sl. Sour CLONAL 3/923790 1.0% OK, citrus, 3 4 2 3 Clearnitrile, lemon VELOUTONE 4/949088 1.0% OK, fruity, 3 3 3 3 Clear jasmineMETHYL 4/933020 1.0% OK, orange 2 2 2 2 NAPHTHYL clear flower, KETONEweak 10% dpg NEROLIN 3/959050 1.0% OK, orange 2 3 3 2 YARA Clear flowerYARA 10% dpg SANDRANOL 3/070540 1.0% OK, sandal 3 3 3 4 15 mm woodcloudy CISTULATE 3/920335 1.0% OK, state 3 3 3 2 09126 Clear plasticwoody PADMA 3/064461 1.0% OK, green 3 3 4 3 Clear METHYL 4/131155 1.0%OK, licorice, 3 3 2 2 CHAVICOL Clear anise RHUBAFURAN 4/941135 1.0% OK,aldehydic, 2 2 4 2 Clear herbal RHUBOFIX 3/971450 1.0% OK, green, 2 2 34 Clear aldehydic DELPHONE 4/916128 1.0% OK, jasmone 4 4 4 4 FIRMENICHClear GRAPEFRUIT 0/115317 1.0% OK, woody, 2 1 1 1 BASE Clear grapefruit15.794 B ORANGE 4/777119 1.0% OK, orange, 2 2 2 1 JUICE Clear flatCARBONYLS CAMPHENE 4/726750 1.0% OK, flat 3 2 2 2 Clear pine BENZALDEHYE3/914590 1.0% OK, not 3 2 2 2 Clear typical

C-5 ring with at least Dragoco Olfactive Air Diffusion Average PhenylRing 1 sp2 Material Number Group Stability Coeffiecient Coverage Moiety?carbon ALLYL CYCLOHEXYL PROPIONATE 3/011241 4 marginal 4.86 2.6 N NALLYL HEPTOATE (C-7) 4/010500 5 stable 5.23 2.6 N N ANTHER 3/912100 6stable 4.86 2.6 Y N BENZALDEHYDE* 3/914590 10   stable* 7.5 3.5 Y NCAMPHENE* 4/726750 10  marginal 6.13 3.0 N N CEDRAMBER 3/018911 6 stablen/a 2.3 N N CEDROL LIQUID 10% 3/019281 6 stable 4.25 3.3 N N CISTULATE09126 3/920335 8 not stable n/a 2.6 N N CLONAL 3/923790 7 stable 4.663.0 N N CRESSANTHER 3/045062 5 stable n/a 2.3 Y N CYCLOHEXYL ETHANOL3/924060 4 stable 6.29 2.0 N N DELPHONE, FIRMENICH 4/916128 9 stable5.46 4.0 N Y DIHYDRO TERPINEOL 4/016236 3 not stable 5.47 2.0 N N DIOLA3/926899 1 stable 6.51 4.3 N N ETHYL ACETOACETATE 4/910050 1 not stable5.54 1.6 N N EUCALYPTUS GLOBULUS 1/913422 6 stable n/a 2.0 N N FLORAZONE3/034395 2 marginal 4.99 3.6 Y N FLOROL 3/934060 4 stable 5.21 3.0 N NGALAXOLIDE 50 DEP 10% 4/900551 7 stable 4.07 3.0 N N GERANYL ACETATE3/039991 4 not stable 4.78 1.0 N N GRAPEFRUIT BASE 15.794 B* 0/11531710  stable n/a 1.5 U U HEXYL CINNAMIC ALDEHYDE 3/011371 1 not stable4.45 2.3 Y N ISO BORNYL ACETATE 3/943760 2 not stable 4.92 2.6 N N ISO ESUPER 0/115115 2 not stable 4.18 3.3 N N LILIAL 4/929325 1 not stable4.7 2.6 Y N MAYOL 3/954401 6 not stable 5.45 2.3 N N MELANOL 3/054211 3not stable 5.79 2.0 N N METHYL CHAVICOL 4/131155 9 not stable 5.91 2.3 YN METHYL IONONE GAMMA 4/931205 3 marginal 4.53 3.3 N N METHYL NAPHTHYLKETONE 10% 4/933020 8 stable 5.52 2.0 Y N NEROLIN YARA YARA 10% 3/9590508 stable 5.84 2.6 Y N ORANGE JUICE CARBONYLS* 4/777119 10  stable n/a2.5 N N ORANGE OIL FLORIDA 4/777160 1 not stable n/a 2.3 U U PADMA3/064461 9 stable 5.71 3.3 Y N PETIOLE 4/780162 5 marginal n/a 2.6 Y NPHENAFLEUR 3/964150 7 stable 4.77 2.3 Y N PHENYL ETHYL ALCOHOL 3/9645402 stable 6.76 4.3 Y N PRENYL ACETATE 3/026832 4 not stable 6.49 1.0 N NRHUBAFURAN 4/941135 9 not stable n/a 2.6 Y N RHUBOFIX 3/971450 9 notstable n/a 3.0 N N ROSEMARY OIL TUNISIA 1/510706 5 stable n/a 2.6 N NSANDRANOL 3/070540 8 stable 4.44 3.3 N Y TETRAHYDRO LINALOOL 4/901360 2stable 5.33 2.6 N N TONALID 10% 3/976500 7 stable 2.0 N NTRIDECENE-2-NITRILE 3/076791 7 not stable 4.32 3.0 N N VELOUTONE4/949088 8 stable 4.59 3.0 N Y YLANAT 3/084021 3 not stable 4.79 2.3 N NYLANAT ORTHO 3/084027 3 not stable 4.77 2.6 N N YSAMBER K 3/055120 5 notstable n/a 2.0 N N * = tested only at 5 and 38 C * = changed character,but not offensive

Although this invention has been described in its preferred form with acertain degree of particularity with respect to a method for determiningperfumes to be used to mask ammonia in a hair treatment composition, itis understood that the present disclosure of the preferred form has beenmade only by way of example, and that numerous changes in the details ofstructures and composition of the product may be resorted to withoutdeparting from the spirit and scope of the invention.

What is claimed is:
 1. A method for masking the perception of ammoniafrom an aqueous media comprising: providing an aqueous media containing1-15 wt. % ammonia; adding to said aqueous media a sufficient amount ofat least one perfume which is olfactively stable in said aqueous mediato suppress the perception of ammonia; wherein the perfume satisfies oneof the following criteria: 1) contains a phenyl ring moiety and has anair diffusion coefficient of >5.7, 2) contains a C-5 ring moiety, whichalso contains at least 1 carbon which is sp2 hybridized, and has an airdiffusion coefficient of >4.4.
 2. A method as in claim 1, wherein saidperfume contains at least 25% of materials satisfying criteria (1) or(2).
 3. A method as in claim 1, wherein said aqueous media contains from5 to 10 wt. % ammonia.
 4. A method as in claim 1, wherein said aqueousmedia is selected from the group consisting of hair colorants and hairbleaches.
 5. An ammonia-containing hair treatment composition havingreduced ammonia odor, said composition comprising: aqueous mediacontaining 1-15% ammonia; at least one perfume in sufficient amount tosuppress the perception of ammonia; wherein the perfume is olfactivelystable in the aqueous media and satisfies one of the followingcriteria: 1) contains a phenyl ring moiety and has an air diffusioncoefficient of >5.7, 2) contains a C-5 ring moiety, which also containsat least 1 carbon which is sp2 hybridized, and has an air diffusioncoefficient of >4.4.
 6. An ammonia-containing hair treatment compositionas in claim 5, wherein said composition is a hair colorant.
 7. Anammonia-containing hair treatment composition as in claim 5, whereinsaid composition is a hair bleach.
 8. An ammonia-containing hairtreatment composition as in claim 5, wherein said composition is a gelcomposition.